Settings to control suggestions.

autoload/ale/lsp_linter.vim

@@ -159,6 +159,7 @@ function! ale#lsp_linter#HandleLSPResponse(conn_id, response) abort
         call s:HandleTSServerDiagnostics(a:response, 'syntax')
     elseif get(a:response, 'type', '') is# 'event'
     \&& get(a:response, 'event', '') is# 'suggestionDiag'
+    \&& get(g:, 'ale_lsp_suggestions', '1') == 1
         call s:HandleTSServerDiagnostics(a:response, 'suggestion')
     endif
 endfunction

doc/ale.txt

@@ -1677,6 +1677,15 @@ g:ale_lsp_show_message_severity               *g:ale_lsp_show_message_severity*
   `'disabled'`    - Doesn't display any information at all.
 
 
+g:ale_lsp_suggestions                                   *g:ale_lsp_suggestions*
+
+  Type: |Number|
+  Default: 1
+
+  This variable defines if suggestions must be collected from LSP or tsserver
+  and shown.
+
+
 g:ale_lsp_root                                                 *g:ale_lsp_root*
                                                                *b:ale_lsp_root*